drm/xe: Add struct xe_vma_ops abstraction

Having a structure which encapsulates a list of VMA operations will help
enable 1 job for the entire list.

v2:
 - Rebase
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Oak Zeng <oak.zeng@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240425045513.1913039-5-matthew.brost@intel.com

drivers/gpu/drm/xe/xe_vm.c

@@ -2252,7 +2252,7 @@ static int xe_vma_op_commit(struct xe_vm *vm, struct xe_vma_op *op)
 static int vm_bind_ioctl_ops_parse(struct xe_vm *vm, struct xe_exec_queue *q,
 				   struct drm_gpuva_ops *ops,
 				   struct xe_sync_entry *syncs, u32 num_syncs,
-				   struct list_head *ops_list, bool last)
+				   struct xe_vma_ops *vops, bool last)
 {
 	struct xe_device *xe = vm->xe;
 	struct xe_vma_op *last_op = NULL;
@@ -2264,11 +2264,11 @@ static int vm_bind_ioctl_ops_parse(struct xe_vm *vm, struct xe_exec_queue *q,
 	drm_gpuva_for_each_op(__op, ops) {
 		struct xe_vma_op *op = gpuva_op_to_vma_op(__op);
 		struct xe_vma *vma;
-		bool first = list_empty(ops_list);
+		bool first = list_empty(&vops->list);
 		unsigned int flags = 0;
 
 		INIT_LIST_HEAD(&op->link);
-		list_add_tail(&op->link, ops_list);
+		list_add_tail(&op->link, &vops->list);
 
 		if (first) {
 			op->flags |= XE_VMA_OP_FIRST;
@@ -2394,7 +2394,7 @@ static int vm_bind_ioctl_ops_parse(struct xe_vm *vm, struct xe_exec_queue *q,
 	}
 
 	/* FIXME: Unhandled corner case */
-	XE_WARN_ON(!last_op && last && !list_empty(ops_list));
+	XE_WARN_ON(!last_op && last && !list_empty(&vops->list));
 
 	if (!last_op)
 		return 0;
@@ -2734,7 +2734,7 @@ static int op_lock_and_prep(struct drm_exec *exec, struct xe_vm *vm,
 
 static int vm_bind_ioctl_ops_lock_and_prep(struct drm_exec *exec,
 					   struct xe_vm *vm,
-					   struct list_head *ops_list)
+					   struct xe_vma_ops *vops)
 {
 	struct xe_vma_op *op;
 	int err;
@@ -2743,7 +2743,7 @@ static int vm_bind_ioctl_ops_lock_and_prep(struct drm_exec *exec,
 	if (err)
 		return err;
 
-	list_for_each_entry(op, ops_list, link) {
+	list_for_each_entry(op, &vops->list, link) {
 		err = op_lock_and_prep(exec, vm, op);
 		if (err)
 			return err;
@@ -2753,13 +2753,13 @@ static int vm_bind_ioctl_ops_lock_and_prep(struct drm_exec *exec,
 }
 
 static struct dma_fence *ops_execute(struct xe_vm *vm,
-				     struct list_head *ops_list,
+				     struct xe_vma_ops *vops,
 				     bool cleanup)
 {
 	struct xe_vma_op *op, *next;
 	struct dma_fence *fence = NULL;
 
-	list_for_each_entry_safe(op, next, ops_list, link) {
+	list_for_each_entry_safe(op, next, &vops->list, link) {
 		if (!IS_ERR(fence)) {
 			dma_fence_put(fence);
 			fence = xe_vma_op_execute(vm, op);
@@ -2777,7 +2777,7 @@ static struct dma_fence *ops_execute(struct xe_vm *vm,
 }
 
 static int vm_bind_ioctl_ops_execute(struct xe_vm *vm,
-				     struct list_head *ops_list)
+				     struct xe_vma_ops *vops)
 {
 	struct drm_exec exec;
 	struct dma_fence *fence;
@@ -2788,12 +2788,12 @@ static int vm_bind_ioctl_ops_execute(struct xe_vm *vm,
 	drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT |
 		      DRM_EXEC_IGNORE_DUPLICATES, 0);
 	drm_exec_until_all_locked(&exec) {
-		err = vm_bind_ioctl_ops_lock_and_prep(&exec, vm, ops_list);
+		err = vm_bind_ioctl_ops_lock_and_prep(&exec, vm, vops);
 		drm_exec_retry_on_contention(&exec);
 		if (err)
 			goto unlock;
 
-		fence = ops_execute(vm, ops_list, true);
+		fence = ops_execute(vm, vops, true);
 		if (IS_ERR(fence)) {
 			err = PTR_ERR(fence);
 			/* FIXME: Killing VM rather than proper error handling */
@@ -2954,6 +2954,11 @@ static int vm_bind_ioctl_signal_fences(struct xe_vm *vm,
 	return err;
 }
 
+static void xe_vma_ops_init(struct xe_vma_ops *vops)
+{
+	INIT_LIST_HEAD(&vops->list);
+}
+
 int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 {
 	struct xe_device *xe = to_xe_device(dev);
@@ -2967,7 +2972,7 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 	u32 num_syncs, num_ufence = 0;
 	struct xe_sync_entry *syncs = NULL;
 	struct drm_xe_vm_bind_op *bind_ops;
-	LIST_HEAD(ops_list);
+	struct xe_vma_ops vops;
 	int err;
 	int i;
 
@@ -3118,6 +3123,7 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 		goto free_syncs;
 	}
 
+	xe_vma_ops_init(&vops);
 	for (i = 0; i < args->num_binds; ++i) {
 		u64 range = bind_ops[i].range;
 		u64 addr = bind_ops[i].addr;
@@ -3137,14 +3143,13 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 		}
 
 		err = vm_bind_ioctl_ops_parse(vm, q, ops[i], syncs, num_syncs,
-					      &ops_list,
-					      i == args->num_binds - 1);
+					      &vops, i == args->num_binds - 1);
 		if (err)
 			goto unwind_ops;
 	}
 
 	/* Nothing to do */
-	if (list_empty(&ops_list)) {
+	if (list_empty(&vops.list)) {
 		err = -ENODATA;
 		goto unwind_ops;
 	}
@@ -3153,7 +3158,7 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 	if (q)
 		xe_exec_queue_get(q);
 
-	err = vm_bind_ioctl_ops_execute(vm, &ops_list);
+	err = vm_bind_ioctl_ops_execute(vm, &vops);
 
 	up_write(&vm->lock);
 

drivers/gpu/drm/xe/xe_vm_types.h

@@ -358,4 +358,11 @@ struct xe_vma_op {
 		struct xe_vma_op_prefetch prefetch;
 	};
 };
+
+/** struct xe_vma_ops - VMA operations */
+struct xe_vma_ops {
+	/** @list: list of VMA operations */
+	struct list_head list;
+};
+
 #endif